| orbit each other | 0.41 |
| explode as supernova | 0.35 |
| build up layers of plas… | 0.33 |
| emit radio waves | 0.25 |
| collapse into black hole | 0.25 |
| slow down over time | 0.25 |
| multicolore supernova r… | 0.16 |
| strong magnetic fields | 0.42 |
| crust | 0.25 |
| dense | 0.64 |
| massive | 0.55 |
| detectable | 0.55 |
| small | 0.49 |
| compact | 0.25 |
| invisible | 0.25 |
| transparent | 0.25 |
| formed | 0.70 |
| discovered | 0.25 |